Just to get some more input, my friend who has been flying gas since gas engines came out tried to fly my airplane. He has three tail draggers that he brings to the field, a bipe with twin cylinder 60cc and two others in the 50 , 60 cc range. He pushed the throttle forward, the plane rolled forward about 8 feet and did a 180 degree right turn. He looked at me with an expression of pure surprise on his face. Never had that happen before.

In order to get the plane in the air I must be very gentle on the throttle. The plane is unstable and dances down the runway until it lifts off. At this point it has just enough power to fly, going immediately to full throttle gives a gentle left turn easy to correct with the rudder. All of this points to a landing gear problem. or perhaps CG. Landings are smooth and well behaved. Taxing back to the pit is a challenge. It will switch back and forth as to which way it wants to go. Next three days will be rain and wind, time to make some measurements..

I am not ignoring any of the suggestions. At the age of 81, I have 2 acres of grounds and five rental properties to look after. along with a small tree farm, and this is the busy season.

Jerry